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バッテリ管理 IC
バッテリ・チャージャ IC

LP3947

最終購入段階

USB/AC アダプタ、シングル・セル・リチウムイオン・バッテリ・チャージャ IC

ご注文はこちら
データシート

LP3947

最終購入段階
データシート ご注文はこちら

製品詳細

Number of series cells 1 Charge current (max) (A) 0.75 Vin (max) (V) 6 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 6.5 Control topology Linear Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.3 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1 Charge current (max) (A) 0.75 Vin (max) (V) 6 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Absolute max Vin (max) (V) 6.5 Control topology Linear Control interface I2C Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.3 Rating Catalog Operating temperature range (°C) -40 to 85
WSON (NHL) 14 16 mm² 4 x 4
  • Supports USB Charging Scheme
  • Integrated Pass Transistor
  • Near-Depleted Battery Preconditioning
  • Monitors Battery Temperature
  • Built-In 5.6 Hour Timer
  • Under Voltage and Over Voltage Lockout
  • Charge Status Indicators
  • Charge Current Monitor Analog Output
  • LDO Mode Operation can source 1 Amp
  • Continuous Over Current/Temperature Protection

Key Specifications

  • 1% Charger Voltage Accuracy Over
    0°C ≤ TJ ≤ 85°C
  • 4.3V to 6V Input Voltage Range
  • 100 mA to 750 mA Charge Current Range, in Charger Mode
  • 100 mA to 500 mA Charge Current Range, in USB Mode
  • WSON Package Power Dissipation:
    2.7W at TA = 25°C

All trademarks are the property of their respective owners.

  • Supports USB Charging Scheme
  • Integrated Pass Transistor
  • Near-Depleted Battery Preconditioning
  • Monitors Battery Temperature
  • Built-In 5.6 Hour Timer
  • Under Voltage and Over Voltage Lockout
  • Charge Status Indicators
  • Charge Current Monitor Analog Output
  • LDO Mode Operation can source 1 Amp
  • Continuous Over Current/Temperature Protection

Key Specifications

  • 1% Charger Voltage Accuracy Over
    0°C ≤ TJ ≤ 85°C
  • 4.3V to 6V Input Voltage Range
  • 100 mA to 750 mA Charge Current Range, in Charger Mode
  • 100 mA to 500 mA Charge Current Range, in USB Mode
  • WSON Package Power Dissipation:
    2.7W at TA = 25°C

All trademarks are the property of their respective owners.

The LP3947 is a complete charge management system that safely charges and maintains a Li-Ion battery from either USB power source or AC adaptor. In USB mode, the LP3947 supports charging in low power or high power mode. Alternatively, the LP3947 can take charge from AC adaptor. In both USB and AC adaptor modes, charge current, battery regulation voltage, and End of Charge (EOC) point can be selected via I2C interface. The LP3947 can also operate on default values that are pre-programmed in the factory. The battery temperature is monitored continuously at the Ts pin to safeguard against hazardous charging conditions. The charger also has under-voltage and over-voltage protection as well as an internal 5.6 hr timer to protect the battery. The pass transistor and charge current sensing resistor are all integrated inside the LP3947.

The LP3947 operates in four modes: pre-qualification, constant current, constant voltage and maintenance modes. There are two open drain outputs for status indication. An internal amplifier readily converts the charge current into a voltage. Also, the charger can operate in an LDO mode providing a maximum of 1.2 Amp to the load.

The LP3947 is a complete charge management system that safely charges and maintains a Li-Ion battery from either USB power source or AC adaptor. In USB mode, the LP3947 supports charging in low power or high power mode. Alternatively, the LP3947 can take charge from AC adaptor. In both USB and AC adaptor modes, charge current, battery regulation voltage, and End of Charge (EOC) point can be selected via I2C interface. The LP3947 can also operate on default values that are pre-programmed in the factory. The battery temperature is monitored continuously at the Ts pin to safeguard against hazardous charging conditions. The charger also has under-voltage and over-voltage protection as well as an internal 5.6 hr timer to protect the battery. The pass transistor and charge current sensing resistor are all integrated inside the LP3947.

The LP3947 operates in four modes: pre-qualification, constant current, constant voltage and maintenance modes. There are two open drain outputs for status indication. An internal amplifier readily converts the charge current into a voltage. Also, the charger can operate in an LDO mode providing a maximum of 1.2 Amp to the load.
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種類 タイトル 最新の英語版をダウンロード 日付
* データシート LP3947 USB/AC Adaptor, Single Cell Li-Ion Battery Charger IC データシート (Rev. B) 2013年 4月 2日

購入と品質

記載されている情報：
  • RoHS
  • REACH
  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用原材料
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果
記載されている情報：
  • ファブの拠点
  • 組み立てを実施した拠点